I need advice with my long distance relationship?

[Brandon .]

Okay, usually I would never do this, but I'm desperate because I really like this girl, and I'm at the point at which I may break up with her because of the way she is acting, and I really do not want to lose her.

Here's a little background:
She lives 200 miles away from me (4 hour train ride)
I see her four days out of every month.
I'm her first boyfriend, and we've been dating for three months.
text messages is how we usually communicate (we text all day, and we sleep with eachother on webcam every night)

Okay, so everything between us was fine at the beginning, I mean PERFECT. There were times when it felt like she was uninterested in texting me, but those little moments come and go with her. I'm her first boyfriend, so I give her some slack.
There has been a time in which she acted completely distant for a full day, and I called her out on it. (She apologized, said she didn't know why she acts like that sometimes, and I forgave her. Obviously it's not something she does on purpose)
We had sex not too long ago, I was her first.(no sketchiness, she's 19 and I'm 20) Ever since then, we have had a few dirty talks over text message (sexual, what we're going to do with each other sexually when we see eachother) and two over webcam. These were NOT all initiated by me. A lot were by her, so I know she wasn't forcing herself to do it.
The last time was about a week ago.
However, recently she has been acting very distant. When i ask her what the problem is, she says "Nothing is wrong, I promise" (this is all over text messages btw) and when I ask "Why are you being so monotone over text? And taking so long?" she'll either say "This is just how I text" or "Because I get bored of texting sometimes, sorry" (which was actually pretty hurtful, being that I only see her four days every month, so the majority of our relationship is over text message) but I let it slide. However, i know for a fact it isn't "Just the way she texts" because I've had great conversations with her over texts. She has full DAYS or WEEKS in which she is pleasant to talk to over text! But now she is trying o convince me that this is the way she always is.
She does have bursts of little sweet texts, but that's it. She'll send a kiss over text once in awhile.
Also, I've noticed that she usually won't say anything sweet unless I say it first. And even if I do say it first, she will either just plainly say it back, or ignore the sweet thing that I said and just respond to the text message normally, as if the little sweet part (I miss you! I really like you! You looked pretty yesterday! etc)
Another thing is, that the other day, I tried to initiate the sexual text messages again, and she went along with it for about two messages, and quickly changed the subject. Never mentioned it again since.
However, recently she posted my name with hearts on her bio on instagram.(I've had her name on it for two weeks already, but still a note worthy gesture from someone who acts distant.)
We argue almost every single day, because of the way she acts. EVERY SINGLE DAY. We almost broke up once(few days ago), and she cried, which confused the hell out of me. Obviously though, one of us has the problem.

What do you guys think? Is there something wrong with me? Am I overreacting? Or is she acting wrong?
I want to do something about this, because I like her a lot, and every time we hang out in person, it's a GREAT experience, but I don't think I'm willing to be miserable in my relationship for 25 days just to enjoy those 4 special days.
I've already brought it up, she denies anything being wrong, so I really don't know where to go from here. I'm not going to threaten her by saying I will break up with her if she doesn't change, because that would obviously only make her try until she was out of the danger zone. I have a feeling that she has a problem, and she won't tell me because shes not used to telling someone all of her issues. Let me know what you would do! (What do I do when I ask what is wrong and she says "nothing" ?)

[Langie]

Aww, i feel you and your pain!! Im in a long distance relationship too. Im from Cali, ges from Texas/: Yeah i know. My boyfriend just recently started acting like that too, he takes slower to reply and doesnt tell me where he went but always say 'sorry! Haha' . He doesnt write me paragraphs of how he loves me or whatever anymore, he just says hes lazy. But you and her, theres probably something bothering her and she cant or doesnt say but what she said to you is really hurtful. Just ask and tell her again to see if anything is okay, cause you dont want to lose her. I know how you feel. I really do. Well i cant help but hopefully you feel better! Good luck matee

[rOUnaK]

The best thing I can suggest is to talk to her face to face so she tells you straight up. Goodluck

[Hello X]

Hey i know where u are coming from-im in a long distance relationship and i only see my boyfriend once every two weeks for only 3,4 or 5 hours but we have been dating for nearly 2 years in less than 4 months. So i do know that it is complicated.
Sometimes she may act distant from u because she is missing u more on that day (happens with me and i dont like to tell my boyfriend because i think he'll just get annoyed or something-he wont but i just get scared). When she says 'Nothing im fine i promise' u should say something like 'come on babe, i know u better than that and i can tell something's wrong please tell me' like 'push her' in a loving way if that makes sense. She may say this because she probably doesnt want to feel annoying by complaining about her problems and everything but explain to her that u wont get annoyed and ur there for her no matter what.
When she said 'i just get bored of texting sometimes sorry' could literally initiate she wants to see u instead of talk through a screen however that is neither of ur faults or again she could be missing u and texting u could make her miss u more. As for 'this is just the way i text' she could just be going through a rough patch at home/college/universtiy/jobs/friends and that could be the reason behind her seeming distant towards u. She probably wont say anything sweet to u first is because she's shy incase it sounds pathetic or u dont want to hear it and when u initiate it first she knows that u are ok with it as u started this 'cute texting' first. She may feel abit self conscious about like when u compliment her or something and if u say 'i love u ' when she is feeling down, she may wonder like ''why do u love me for' or something or putting herself down. If she posted hearts on her bio and ur name then i shouldn't worry that much its if she erased ur name from her bio or made it more 'simple' eg ur name and no hearts or kisses etc. If she cried when u nearly broke up obviously she still wants to be with u otherwise she would've said something like 'go on then leave' or 'egged' u on to break up but if she cried-shes scared of losing u and will blame it on herself like 'what have i done' or something.
I dont think there is anything else i can say im sorry but it is partially down to long distance relationship disadvantages. U cant see how she acts in school/college/work to know if there is definately something wrong or if she looks at another guy or something.
Good luck im sorry i didnt give much advice but i hope u get along well. x

[Sam.]

What to do in this situation is entirely up to you at this point but I can give you a few suggestions.

Try something different to get her attention. If she's getting bored of texts and doesn't want to feel like she has a relationship with her phone/computer, surprise her by sending her roses. Or write her a romantic hand-written letter. Or ask her to write you one if she likes crafts. (If she doesn't, don't ask for one.) If she's the romantic kind of girl who is into sappy things, you could make her a playlist of songs that remind you of her and mail her a CD. You kind of have to get creative here. Or you could buy matching necklaces or something. There are little things like that for people who are in LDRs.

Or if you feel like getting more creative and trying to make your relationship new, different, and fun isn't going to solve anything, you may want to think about breaking up. Maybe a LDR isn't making your girlfriend happy. Maybe that's just not something she wants in her life. That was an issue for an ex of mine. We had a relationship in person for about 10 months when we went to college together but both of us transferred. It wasn't me that he didn't want in his life, but a long distance relationship. I just happened to be part of that. I know it sounds harsh but I don't blame him for that at all. Maybe your girlfriend would be happier in a relationship that didn't involve distance. This could be something that you just need to talk to her about.